Sewing machine



FIG. 1 is a front elevational view of a sewing machine showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a rear elevational view;

FIG. 4 is a left end elevational view thereof; and

FIG. 5 is a right end elevational view thereof.

The bottom plan view presents a configuration consistent with the configuration indents, and angles seen on the lower portion in FIGS. 1 and 3-5. 

The ornamental design for a sewing machine, substantially as shown and described. 